Deploy to fly.io with github actions

[umarhadi]

Description

Migration to Fly Apps V2 was done to take advantage of the auto stop machine feature when there are no requests and auto start machine when incoming requests are detected, resulting in cost savings and optimization. Additionally, I removed the copy .env command in the Dockerfile.fly as we can utilize flyctl secrets to manage environment variables. Lastly, I added GitHub Actions for automated deployment to Fly.io. Before running these actions, don't forget to configure the required environment variables in GitHub Secrets.

Checklist

• [x] Changes have been thoroughly tested
• [x] No conflicts with other branches
• [x] Documentation has been updated

[vercel[bot]]

@umarhadi is attempting to deploy a commit to the Restfire Studio Team on Vercel.

A member of the Team first needs to authorize it.